Severe storms to pummel portions of the north-central US
After scorching temperatures at the beginning of the week, the north-central United States has to adjust to a different weather threat in the middle of the week.
The region had a hint of storm at the beginning of the week when dangerous thunderstorms inundated parts of the region with hail and rain on Sunday. Western North Dakota was hit by hail on Sunday when baseball-sized hail was reported in the counties of Adams and Hettinger.
After a short break from the severe threat on Monday, residents of the north-central United States will have to watch out for heavy thunderstorms on Tuesday and Wednesday.
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"If a low-pressure, warm-fronted area moves north from North Dakota to southwest Manitoba late Tuesday afternoon and Tuesday night, severe thunderstorms will occur," said AccuWeather meteorologist Ryan Adamson. "The highest serious probabilities will be in the west of North Dakota, in the southeast of Saskatchewan and in the southwest of Manitoba."
Residents of cities like Bismarck and Minot in North Dakota, as well as the Standing Rock and Cheyenne River reserves in South Dakota, must remain weather-aware until Tuesday evening.
Tuesday's storms will be more isolated and organized clusters or storm lines are not expected to develop. However, storms that come up on Tuesday can do quite a blow.
"The main threats from Tuesday's storms are high hail and harmful winds with an AccuWeather Local StormMax ™ of 110 km / h," said Adamson.
For Wednesday afternoons and evenings, the risk of severe thunderstorms will shift east to the south of Manitoba, eastern Dakotas and northwest Minnesota.
"A cold air bubble in the upper atmosphere moving east from the Rocky Mountains, along with a cold front, will make storms much more common on Wednesday than on Tuesday," said Adamson.
On this front, temperatures will rise for much of the region in the mid to mid-1990s, 15 to 20 degrees Fahrenheit above normal in mid-June. Those who spend a lot of time outdoors before afternoon storms develop need to stay well hydrated to avoid heat related illnesses such as heat exhaustion and heat stroke.
When the cold front digs into the area on Wednesday afternoon, it encounters very warm air and increasing moisture on the surface, which provides ample atmospheric fuel for some explosive storms.
"Wednesday's threats will be similar to Tuesday's, but will cover a wider area," said Adamson. "However, local flash floods and isolated tornadoes will pose additional threats compared to Tuesday."
Storms that develop on Wednesday afternoons may freeze into harmful storm lines rather than individual cells. If the storms freeze on Wednesday, the risk of widespread wind damage increases, as does the risk of isolated tornadoes.
Some cities at risk of heavy hail, heavy rainfall and harmful winds with an AccuWeather Local StormMax ™ of 110 km / h and even one or two isolated tornadoes are Aberdeen, South Dakota; Fargo and Grand Forks, North Dakota; and Winnipeg, Manitoba, Canada.
Much of the region is predicted to have drier and cooler weather after the cold front has left and storms subside later on Wednesday evening. Many locations will return to seasonal conditions. The high temperatures on Thursday are expected to be 15 to 20 degrees below Wednesday.
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